package org.example.dlx;

import com.rabbitmq.client.*;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: anlu
 * @Date: 2021/06/23
 * @Description: 普通的消费者，消费死信队列dlx_accept
 */
public class DlxProcessConsumer {

    public final static String DLX_EXCHANGE_NAME = "dlx_accept";

    public static void main(String[] argv)
            throws IOException, TimeoutException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");

        // 打开连接和创建频道，与发送端一样
        Connection connection = factory.newConnection();
        final Channel channel = connection.createChannel();
        // 定义一个交换器
        channel.exchangeDeclare(DLX_EXCHANGE_NAME,
                BuiltinExchangeType.TOPIC);
        /*声明一个队列*/
        String queueName = "dlx_accept";
        channel.queueDeclare(queueName,false,false,
                false,null);

        //绑定，将队列和交换器通过路由键进行绑定
        channel.queueBind(queueName,DLX_EXCHANGE_NAME,"#");
        System.out.println("waiting for message........");
        /*声明了一个死信消费者*/
        final Consumer consumer = new DefaultConsumer(channel){
            @Override
            public void handleDelivery(String consumerTag,
                                       Envelope envelope,
                                       AMQP.BasicProperties properties,
                                       byte[] body) throws IOException {
                String message = new String(body, "UTF-8");
                System.out.println("Received dead letter["
                        +envelope.getRoutingKey()
                        +"]"+message);
            }
        };
        /*消费者正式开始在指定队列上消费消息*/
        channel.basicConsume(queueName,true,consumer);

    }
}
